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<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2018/03/07/PHP新的垃圾回收机制/" itemprop="url">PHP新的垃圾回收机制</a></h1>
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2018-03-07
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1,450
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<span class="post-meta-item-text">阅读时长 ≈</span>
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5
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<h1 id="介绍"><a href="#介绍" class="headerlink" title="介绍"></a>介绍</h1><p>在阅读本篇博文之前，建议先了解一下: <a href="/2018/03/06/深入理解PHP内核之ZVAL/">PHP内核之ZVAL</a><br>PHP是一门托管型语言，所以在写PHP代码时无需手动处理内存的分配和释放，也就是说PHP自身实现了垃圾自动回收(GC).<br>在PHP官方你可以看到关于GC的介绍: <a href="http://php.net/manual/zh/features.gc.php" rel="external nofollow noopener noreferrer" target="_blank">传送</a></p>
<h1 id="PHP5-2中的垃圾回收算法"><a href="#PHP5-2中的垃圾回收算法" class="headerlink" title="PHP5.2中的垃圾回收算法"></a>PHP5.2中的垃圾回收算法</h1><p> 在php5.3之前，PHP使用的内存回收算法是大名鼎鼎的<a href="https://en.wikipedia.org/wiki/Reference_counting" rel="external nofollow noopener noreferrer" target="_blank">Reference counting</a>(引用计数)</p>
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<a class="post-title-link" href="/2018/03/06/深入理解PHP内核之ZVAL/" itemprop="url">深入理解PHP内核之ZVAL</a></h1>
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2018-03-06
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738
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<span class="post-meta-item-text">阅读时长 ≈</span>
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3
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<p>PHP是一种弱类型语言，但是弱类型并不代表PHP变量就没有类型区分</p>
<p>PHP的类型有8种</p>
<ul>
<li>标量类型：boolen(布尔)，integer(整型)，float(浮点)，string(字符)</li>
<li>复合类型：array(数组)，object(对象)</li>
<li>特殊类型：resource(资源) null</li>
</ul>
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